Portion of a protective case



FIG. 1 is a bottom perspective view of the design according to the present invention;

FIG. 2 is a rear elevation view of the design according to the present invention;

FIG. 3 is a right side elevation view of the design according to the present invention;

FIG. 4 is a bottom plan view of the design according to the present invention;

FIG. 5 is a front elevation view of the design according to the present invention;

FIG. 6 is a left side elevation view of the design according to the present invention; and,

FIG. 7 is a top plan view of the design according to the present invention.

In the drawing, the broken lines depict unclaimed environment. 

The ornamental design for a portion of a protective case, as shown and described. 